Question

a simple pendulum of lengh l,the mass of whose bob is m,is observed to have a speed v0 when the cord makes an angle theta0(0<theta<pi/2).In terms of g and the foregoing given quantities,determinate the least value v2 that v0 could have if the cord is to achieve a horizontal position during the motion, and the speed v3 such that if v0>v3 the pendulum will not oscillate but rather will continue to move around in a verical circle